Nut-lock.



I. L. MILLER NUT LOOK. APPLICATION FILED MAY 1'8 1903.

Patented Feb. 28', 1911.

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UNITE SATES FATT FFTQE,

ISAAC L. MILLER, OF NEW YORK, N. Y., ASSIGNOR, BY DIRECT AND MESNEASSIGN- MENTS, TO UNIVERSAL LOCK-NUT & BOLT COMPANY, A CORPORATION OFNEVJ JERSEY.

NUT-LOCK.

To all whom it may concern:

Be it known that I, ISAAC L. MILLER, a citizen of the United States, andresident of New York city, in the county of Kings and State of New York,have invented certain new and useful Improvements in Nut-Locks, of whichthe following is a specification.

My invention relates to improvements in nut locks, and the object of myinvention is to provide a nut which will fit a standard bolt, or may bemade to fit any desired size of bolt which is not of standarddimensions, and may be made and sold to fit standard bolts, as aseparate article of manufacture,

' and has means for engaging with the bolt to prevent the nut from beingunscrewed from the bolt.

My invention consists in the novel features of construction describedherein and pointed out in claims presented herewith.

Referring to the drawings which form part of this specification, Figure1, is a longitudinal exterior view of a bolt with my improved nut shownin section, and mounted on said bolt, and discloses a side View of thelocking member located therein in locked engagement with the bolt. Fig.2, is an end view of the nut, mounted on the bolt, the lat: ter beingshown in cross section, and the locking member of the nut being shown inits unlocked position on the bolt. Fig. 3, is a similar view to thatshown in Fig. 2, except that the nut is shown in locked relation to thebolt. Fig. 4, is a perspective view of the locking member.

A, indicates the bolt; 13, the nut, and C, the locking member. The nutis provided with a recess B, preferably located opposite to one of theprojecting portions 6, in order to retain the strength of the nut as faras possible, and the shape of the recess is preferably about as shown,that is, the walls B and B are at an acute angle to the dotted line Z-Z.

The wedge shaped member C is provided with a sharp edge at its upperend, and is of less width than the recess B, and its length is nearly aslong as the nut is wide, and is formed substantially as shown in thedrawings. The wedge shaped member C is provided with a threaded face Cthe .threads whereof'are formed to conform to the threads of the bolthaving the same pitch. The bottom C of the threads of the threaded facerests normally on the top Specification of Letters Patent.

Application filed May 18, 1998.

Patented Feb. 28, 1911.

Serial No. 433,380.

of the thread. of the bolt as shown in Fig. 2, when the nut is beingscrewed forward onto the bolt, the lower edge C resting short of thebottom of the thread A as illustrated in F 2, and the side wall of thewedge member C resting against the wall 13 and in this position the nutcan be screwed freely on the bolt in the forward direction.

When the nut is screwed into its tightened position on the bolt themember, C, is under the frictional strain of the engagement. hen the nutstarts to reverse, or unscrew, the member, C, rocks upon the edge G, theleast resistance being offered to this operation. .111 thus rocking, thebottom of the thread of the member, 0, is lifted slightly out of thecontact with the top of the thread of the bolt, except the front edge ofthe member, C, which is caused to bite the top of the bolt thread. Byreason of the triangular shape of the member, C, the length of thethread on the said member in line with the side of the triangle is atrifle more than the height of the thread. In rocking the member, C, thefront edge of the member is moved toward the line between the edge, 0,and the center of the bolt, and thus the extra length or depth of thethread at this point operates to extend to the bottom of the boltthread. When the top of the thread on the member, 0, touches the bottomof the thread in the bolt it will be noticed that a lock complete. Thethree fixed points to wit; the pivot, C, the bottom of the threads onthe member, C, and the top of the threads of the member, G, are all inengagement, and the nut is prevented from further movement. Damage tothe thread of the belt which might be caused by the digging of thethreaded face of the member, G, is also avoided. It will be noted thatthe wedge member 0 therefore tends to rock on the thread A at C and thatthe gripping action takes place at this point, and that the lower edgeof the thread at C prevents the element C from rocking to the wall B byreason of its abutment and pressure against the bottom of the thread A.

This construction insures durability in use, and ease of operation. Incase it is desired to unscrew the nut from the bolt, a pin is insertedand the wedge C forced to the wall B and held there while the nut isrotated to remove the same from the bolt.

Having thus described my invention, what Z i normally on the top of thethread of the bolt, and the threads of thesaid locking chalra cte rdescribed having a V-shaped recess "therein, and a v shaped rockingmember of less width than the said recess, and having a face at theinnerjend threaded to register with the thread on the nut when in'theunlocked positionof said locking member, the

bottom of the thread in said memberresting member'being' formed of lessheight than the height of the thread in the bolt, and

adapted to engage the bottom of the-thread on the boltwhen said memberis rocked in V locking position' v 2. A nut look comprising, a nut ofthe of the thread of the bolt, and said threads being formed of lessheight than the threads in the bolt, and adapted to engage the bottom ofthe thread on the bolt when said loekingmember is rocked to lockedposition.

Signed: at New York city in the county of New York and State of New Yorkthis sixteenth day of May A. D; 1908.

I ISAAC L. MILLER.

Witnesses:

'FRANK M. ASHLEY, JULIUS L. MENDEL.

, Copies of this patent'may beobtained for five cents each, byaddressing the Commissioner of latents,

' Washington, D. C.

